Transactions in ActiveRecord

This demo app is a simple example of using transactions in ActiveRecord.

Running

Setup the app:

• Run bundle to download dependencies
• Run ./bin/rails db:create to create the database
• See db/seeds.rb for the code example.
• Comment either one of the entries for the model attribute.
• Run ./bin/rails db:seed to populate the db. This command should fail, since the model column was defined as not allowing null values according to its migration file
• Check the database and ensure NO records were populated in the "guitars" table.

A simple way to check the database is running the command below

• psql teste_trans_dev
• select * from guitars